ByMatthew ShaerFebruary 4, 2010

You know what they say – as soon as the adults show up, the party's over.

A study released this week by the the Pew Research Center's Internet and American Life Project shows that teens have pulled back on their blog use in the past couple of years, while use by adults has remained steady. The numbers break down like this: In 2006, 28 percent of teens said they blogged regularly. In 2009, by comparison, that number dropped to 18 percent.

Perhaps unsurprisingly, the real growth in the teen market is in social networking. By September of last year, almost three quarters of teens in the US used one social network regularly – a major leap from the 55 percent in November of 2006. "Even with teens' continued enthusiasm for social networking, recent changes in their communication patterns on the sites suggest they are somewhat less tethered to their profiles," Pew researchers noted.

To reiterate: teens don't like blogging as much; they're lukewarm about Twitter; and they're very fickle when it comes to updating their Facebook feed.

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